Knayi Thoma was Persian Merchant?

Almost all the Indian Church historians write about the Syrian Colonization group leader: Thomas Cana (Knayi Thomman). He was a merchant of great wealth and from noble family.  Many of the writers say about him that, he was a Syrian merchant. But some writers say he was a Persian Merchant.  Some modern historians also have called the Syrian Migration as ‘Persian Migration’, ‘Persian Colonization’ etc. But there is no historical evidence.
Jaimon George, Germany